Fever review: Support after bookings problem unhelpful and have a terrible "solution"

On Fever's request I rebooked our 3 tickets due to an issue with the venue. That can happen, so no problem. But the voucher in the app was so unclear and only works once(!). So, after I'd rebooked the first ticket, the voucher disappeared. The app automatically charged me for the other 2. So in the end I'd paid for 5 tickets and still only had 3. Support was very unhelpful. They claim the T&C prevent them from refunding and gave me another(!) voucher for $16 less than the extra amount I'd paid. And that voucher is valid for 8 weeks.
So: I pay for 5 tickets instead of 3 and they give me a barely valid voucher for less than the amount.
This is just robbery.
Never through Fever again .